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Year : 2017  |  Volume : 14  |  Issue : 1  |  Page : 12-16

In-vitro comparison of four different working length determination techniques

Department of Endodontics, Faculty of Dentistry, Tanta University, Tanta, Egypt; Department of Restorative Dental Sciences, College of Dentistry, King Khalid University, Abha, Saudi Arabia

Correspondence Address:
Mohamed I Elshinawy
Department of Restorative Dental Sciences, College of Dentistry, King Khalid University, PO Box 3263, Abha 61471

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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/tdj.tdj_55_16

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Aim: The aim of this study was to compare four different working length determination techniques. Materials and methods: Fifty extracted single-canaled anterior teeth were decoronated. The root canals' working lengths were repetitively determined in five groups (n = 50 each) using regular radiographic film (group 1), digital radiographic image (group 2), cone-beam computed tomographic image (group 3), electronic apex locator (group 4) and direct measurement (group 5, control) by subtracting 0.5 mm from the length of # 15 k-file visible at the apical foramen. The collected data was statistically analyzed using both analysis of variance and least significant difference (LSD) comparisons at P value less than or equal to 0.05. Results: The one-way analysis of variance indicated a difference between the data of study groups (P = 0.011). The LSD comparisons revealed a longer working length (LSD, P ≤ 0.05) in groups 1 and 2 than groups 3 and 5 (control). On the other hand, No difference (LSD, P > 0.05) was detected between the working length in groups 3 and 4 in comparison with group 5 (control). Conclusion: The electronic apex locator and the cone-beam computed tomography are more accurate techniques to determine root canal's working length than the normal and the 2D digital radiographs.

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